CVE-2012-10053 CRITICAL

CVE-2012-10053: Simple Web Server Connection Header Buffer Overflow

Vendor Pmsoftware
Product Simple Web Server
Weakness CWE-121
Published August 8, 2025
Last update April 7, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Simple Web Server 2.2 rc2 contains a stack-based buffer overflow vulnerability in its handling of the Connection HTTP header. When a remote attacker sends an overly long string in this header, the server uses vsprintf() without proper bounds checking, leading to a buffer overflow on the stack. This flaw allows remote attackers to execute arbitrary code with the privileges of the web server process. The vulnerability is triggered before authentication.

Key dates

02Disclosure timeline

August 8, 2025 CVE published
April 7, 2026 Record updated